leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ixgbe: Fix memory leak when SR-IOV VFs are direct assigned

Browse Source 
The VF driver had a memory leak that would occur if VFs were assigned to a
guest.  The amount of leak would vary with the number of VFs but could max
out at about 14K per PF.  To reproduce the leak all you would need to do is
enable all the VFs on the first PF.  Then start a loop of loading and
unloading the driver with max_vfs=63 for the first port.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2012-05-05 05:32:26 +00:00 committed by Jeff Kirsher
parent 1d9c0bfd0f
commit d773d13106
1 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
View File

@ -208,6 +208,17 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
u32 vmdctl;
int i;
/* set num VFs to 0 to prevent access to vfinfo */
adapter->num_vfs = 0;
/* free VF control structures */
kfree(adapter->vfinfo);
adapter->vfinfo = NULL;
/* free macvlan list */
kfree(adapter->mv_list);
adapter->mv_list = NULL;
#ifdef CONFIG_PCI_IOV
/* disable iov and allow time for transactions to clear */
pci_disable_sriov(adapter->pdev);
@ -238,11 +249,7 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
if (adapter->vfinfo[i].vfdev)
pci_dev_put(adapter->vfinfo[i].vfdev);
}
kfree(adapter->vfinfo);
kfree(adapter->mv_list);
adapter->vfinfo = NULL;
adapter->num_vfs = 0;
adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
}